minor fixes

cursor fix for splitter window


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2352 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/notebook.h

@@ -164,6 +164,9 @@ public:
   bool DoPhase(int phase);
   void ApplyWidgetStyle();
 
+  // report if window belongs to notebook  
+  bool IsOwnGtkWindow( GdkWindow *window );
+
   // common part of all ctors
   void Init();